I have a big issue with the simulation software.  I define all my materials in Solidworks and when I go to run a simulation it should just use the defined materials.  Instead I get an error "Please define Elastic modulus in material properties".  It is already defined in the properties so until I define the materials for all the parts in the simulation setup it will keep giving me the error.  I should not have to define the materials in two places for the simulation to work.  Does anyone else ever see this issue.  I am using Solidworks Simulation Professional 2010 x64 SP4.0